Pump



June 14 1927. 1,632,029 s. LARSON PUMP Filed April 20. 1925 2Sheets-Sheet 1 stoodbyreference to the following descrip-.

Patented June 14, 1927.

UNITED STATES PATENT OFFICE.

SWAN LARSON, OF ROCKFORD, ILLINOIS, ASSIGNOR TO GEO. D. ROPERCORPORATION, OFROCKFORD, ILLINOIS, A CORPORATION ILLINOIS.

PUMP. A

Application filed April 20, 1925. Serial No. 24,345.

the invention consists in certain novel combinations and arrangements ofparts as will be more fully described.

struct the cap or supporting bracket upon which 'the handle and fulcrumare pivoted.

as a single casting having a longitudinal slot or central opening toreceive the handle or operating lever and to provide guide means for thepump rod, including the upper slide bar and the piston rod, at the upperand lower ends of said cap. The manufacture of the cap in a one-piececasting as above expressed required coring, an expensive operation inview of the peculiar formation of the cap and the large opening requiredto accommodate the moving parts. Furthermore, it was not possiblereadily to adapt the pump for use as a compression or force pump and asa lift pump.

The present invention overcomes the above objections and among theobjects thereof are to provide a pump having a novel adjustable strokecap or bracket on which the pump handle is fnlcrumed and which serves asa guide for the slide bar and piston rod; novel means for adjustingthestroke of the piston and operation either as ahand pump or a Windmill pump; to so construct the cap in two parts that coringis eliminatedand manufacture and assembling facilitated thereby providing forquantity production and reducing the cost; to provide novel means foradjusting the position and points of connection of the fulcrum with thehandle andcap, and the fulcrum for the handle shifter whereby the strokeof the piston may be adjusted without disassembling the parts ordismantling the cap and operat ing handle or lever,-and to providenoveltop bearing plates secured to the pump base jointly with the capandgui'de means for the pump rod.

Other objects and attendant advantages will be appreciatedby thoseskilled in this.

art as the invention becomes better undertion when considered inconnection with the accompanying drawings, in wh ch--' Figure 1 is aside elevation of apump constructed in accordance with my invention andshowing the same in use as a force or compression pump. 7 1

Fig. 2 is an enlarged front elevation showing the upper partof the pumpand the operating parts to whichthe invention especially relates.Heretofore, it has been customary'to con- F 1g. '3 is an enlargedvertical sectional elevation of the structure shown in Fig. 2. Fig. 4 isa horizontal sectional .v'iewtaken onthe line H ofFig. 3.

Fig. 5 is a horizontal sectional view on the line 5-5 of Fig. 3.

i Fig. 6 is a vertical sectional view taken taken on the line 66 of Fig.1', and

Fig. 7 is a fragmentary sectional view showing theadaptation of the pumpas a lift pump.

Referring to the drawings in detail wherein I have illustrated anembodiment of the invention and in which similar reference charactersdesignate corresponding parts throughout, 8 designates the base of thepump which may be suitably braced 9 the spout and 10the, upper portionof the base arranged to form an air chamber or dome for use inconnectionwith a compression or force pump. The part 10 has a reducedneck portion 11 formed'with an outwardly extending annular fiange'lQ atthe topenlarged internally as indicated at 13 and having an upstandingbearing surface or shoulder. lladapted to receive a packing ring orgasket 15 of heavy tar paper or other suitable material. By thisconstruction a narrow annular packing surface is provided, therebyrequiring less finishing than if the entire annular flange 12 was ofequal thickness. thus also tending to eliminate the possibility of lackof evenness and uniformity and providing a space between the flange anda stufling box flange 16 capping the base at the top of the air chamber10 and rest-. ing upon the gasket 15 supported on the shoulder 14.. Thisstufling box flange has a stufling box or cup 17 cast or formed integraltherewith'and extending down into the neck portion 11 of the air chamberor dome 10 and the bottom 18 thereof is centrally apertured to receivethe pump or piston rod 19 and form an annular seat for a packing 20. Thestufiing box 17: projects ing nut 22 serving to compress the packing andform a liquid and air-tightseal around the piston rod.

An annular upstanding shoulder 23 is also provided on the flange l6in'spaced rolat ion to the upwardly projecting portion 21 and serves asa shoulder or guide to properly locate the bottom 'llanges or basefastening pad portions 2% of a cap or bracket 25 upon the top of thebase 8 and on the plate 16. This cap is formed. in two cast parts havingthe base flanges 24L of semi-annular form which abut at their meeting.edges 26 and are bolted through the plate portion of the llang'o l5 andthe flange 12,.at suitably spaced points, as indicated at 2T.i-rpcrtures are provided in these parts outwardly oil: the shoulder 14-lor this purpose. so that the cap may be clamped to the base and theplate portion of the flange 1 13 maintained in liquid and air-tightconnection therewith in conjunction with the gasket 15.

The cap or bracket 25 comprises two sections including sides or armshaving openings 29 to permitaccess to the nuts of therear bolts 27 andsaid sides are in the form of upwardly extending arms and rearwardlyextending arms 30. The upper ends of the sidesor arms 28 are apcrturcdto receive a bolt 31 for clamping the two sections together at the top,at which point the arms are provided with horizontal forwardly extendingsemi-circular portions 32 abutting to form an annular support or-ring inwhich a bushing 33 is held and supported by the flange 34-. The coactingedges of the por tions 32 forming the ring are provided with opposedpairs o'l. recesses 35 to receive lugs 36 of the bushing "'33, whichupon being insorted in position beneath the ring 32 and turning thebushing, will be moved out of alignment with the recesses as shown inFinn ing ing 5 of the drawings to retain the bushfroin upwarddisplacement. The bushis adapted to shdably receive a shdo .bar 37 ofrectangular cross-section corresponding to the cross-section of theopening in. the bushing as also seen in Fig. 5 of the drawings, and isconnected to the piston rod 19 through the medium of a coupling 38 sothat the two will move together.

The horizontal arms 30 of the bracket are provided with chainttorcdhorizontal grooves 39 on their faces as seen more particularly in Figs.3 and et-of the drawings and the walls of the arms adj accnt the ends ofthe grooves are provided with aligned openings 40 adapted to receive ahorizontal claniping bolt 41 thcrethrough, said bolt also extendingthrough a spacing and bearing sleeve 42 arranged between an opposed pairof Openings and contacting with the end walls 48 of the grooves 39according to the adjustment of the 'bolt'as will be more fullyexplained. A fulcrum 414C in the form of a plunger are reciprocaled.

bar or link has a sleeve 45 at its lower end pivoted on the sleeve orbushing -12 and the sleeve is formed with a lug t6 projectingrearwardly. The upper end of the fulcrum 41--lis :lorked as imlicated at47 to pivotally support ahandle 4:8. For this purpose, the fork receivesthe handle at the lower edge of the latter il'itermcdiatc its ends butnear the inner end and the vertical web oil? the handle is provided witha plurality of spaced openings 49 to receive a pivot pin 50 which alsoextends through apertures in the tork ot' the fulcrum and is tltlitPtQtlto permit adjustment of" the connection along the length of the handletogether with the adj ustment of the lower end of the. :l'ulcrum in theopenii'igs 4-0. The inncrcml of the handle is forked at 51 to straddlethe slide bar 37 and a pin 52 extends through aligned openings in thefork and slide bar to piv otally connect the handle to the latter foractuating the piston rod and pump.

In the position of the parts as shown in Figs. 1 and 3 of thcdrawings,the pivot 11 of the fulcrum 44 is located in the outer or rearwardopenings 40 and the upper end of the fulcrum is connected to the handlethrough the opening 49 remote from the p votal connection 52 of thehandle with the pump rod at the slidebar 37, so that the op eration ofthe handle 48 will impart a maximum stroke to the piston of the pump inview of the, leverage thus produced and the fact that the inner arm ofthe handle or lever is set for the longest adjustment provided for.During the operation of the pump, the fulcrum 4 L will swing oroscillate to and fro on the sleeve 42 as a pivot, this back and "forthmovement of the upper end of the fulcrum compensating for the movementof the pivotal connection of the lever with the pump rod at 52 in astraight line. or path vertically as the piston rod and The movable orshiftable pivot of the operating handle rcievcs the stufling box andbearings, as well as piston rod, slide bar, plunger and connected partsof excessive stresses under the working stresses and forces which wouldtend to cause undue wear or result in the parts getting out ofalignn'icnt or working order, thereby lengthening the useful life of thepump and parts thereof.

It it is desired to shorten the stroke, the pivotal connection 50between the fulcrum and the handle is adjusted to the inner apertures oropenings 40, the innermost adjustment giving the minimum stroke owing tothe shorter leverage or lever arm between the pivotal connection of thefulcrum with the handle and that of the handle with the slide bar orpump r'od. In order to compensate for this adjustment of the fulcrum onthe handle and to permit the use of the same fulcrum with the shorterstroke, the

adjustn'ient of the fulcrum on the cap or liracket25 is provided and itis only neces sary to remove the bolt 41 from the outer or rear openings40 and shift the sleeve 42 sotha-t its bore will align with the inner orforward openings 40 and then reinsert the bolt and apply the nutthereto, in order to adjust the position ofthe fulcrum. This is due tothe fact that the sleeve 42 is held in the grooves 39 and willmaintainthe fulcrum inpivotal connection and support the parts includingthe handle when the bolt is withdrawn so that the sleeve may be shiftedin the grooves without disconnecting the fulcrum therefrom ordismantling the cap or bracket 25 from the base of the pump. Thisadjustment may be quickly accomplished and permits the stroke of thepiston to be adjusted so that the pump can be operated at its highestefficiency. In Figs. 2,3 and i of the drawings, it will be noted thatthe two-part casting comprising the cap or bracket"25 is provided withsuitable reinforcing ribs 53 at the outside to give strength andlightness, the sections or sides of the base of the cap being enlargedto conform 'to theattaching portions 24. Diametrically opposed inwardlyextending webs 54 are provided at the inside of the sections extendingto and partly overlying the shoulder 23 to give additional strength forwithstanding workiiig stresses.

It will be noted from Fig. 5 that the slide bar 37 is of flat stock barmetal and operates through an oblong opening in the bushing whenemployed in connection with the piston rod 19 to which it is connectedby the coupling 38 when the device is used as a compression or forcepump. In th1s instance, the packing establishes a fluid and air,tightconnection withthe piston rod and the gasket establishes a similarconnection between the base at its shoulder 14: and the stuffing boxflange or plate 16. However, when. it is desired to use the device as alift pump, certain of the parts are interchangeable illustratedlllFlg..7 in the drawings.

In this case, the stufling box flange 16 is replaced by a guide plate 55which is bolted through the flange 12 in the same manner as previouslydescribed, in connection with the base of the cap or bracket at theportions 24-. However, in lieu of the stufling box or cup 17 and thepacking employed-iii connection therewith, the guide plate orflange isformed with a guide sleeve 56' elongated or of thickened dimension Wlthrespectto the thickness of theplate and with a rectangular openingcorresponding ciently long to replace the piston rod 19'and operatethrough the long guide bearing or sleeve provided at the top of the pumpbase tion thereof as a lift pump. Inthis event the pump base is made asa 'singlecas'ting with a cylindrical upper portion and the air chamberor dome 10 is omitted. The other parts of the structure are the same andin both cases the lug 46 on the lower end of the fulcrum serves as astop with which the handle 48 contacts to limit the downward swing ofthe handle attheupper limit of the stroke of the piston and relieve thep'ivotal' connection of the fulcrum 44" with the arms 30 of unnecessaryshocks;

From the foregoing, it will be seen that I have provided a verydesirablepump construction which may be interchangeably "used as acompression or force pump and as a liftpump by replacing but few partsof thestructure, according to the type of pump desired. The workingparts are so constructedqas to be of light weightand yet strong anddurable andnotlikely to get out of necessitycf coring as hasbeenpreviously required in a cap of a single casting, but facilitatesassembly, replacement and repair of the parts in addition to providingfor more economical manufacture. The constructionof the plate 16 withthe" integral stufling' box or cup 17 and the packing .providcdin connection therewith, considerablyi simplifies the constructionandreducesthe 'cost of'production of the packing and bearing provided atthis pointfor the-piston rod, eliminating the necessity of employing aseparate internally threaded bushing or sleeve i ivwhich threadsexteiidedcnti-rely through the sleeve,

thereby requiring a nut at the bottom in order to support the packinggland as here l'ofo 'e en'iployed. This also eliminates the use ofabottom nut or parts likelyto get loose due to the constant jarring andvibration when the pump is working. \Vhile it is necessary to'connectthe twosections or parts of the cap and bracket, still the advantagesaccruing from the elimination of the coring and manufacturingdifficulties met with in thel'in'akingof a single part casting in themanufacture of the cap as heretofore done,

greatly exceecltlie cost of connecting the parts'or sections of atwo-part COIlStlllCtlOll l irrespective of the advantagesresulting fromthe additional facility of manufacture, as-

sembling and replacement in accordance Wltl1 'tl18 new construction.There are also the additional advantages of adjustment of the strokeof-the' piston which especially requires a. twopart cap or bracketstructure for facility of assembling so that these features are reliantand more or less interdependent one upon the other. lVhilc I havedescribed what I now consider to be the preferred embodiment of theinvention, it is to be understood that the device is susceptible of widechanges and variations in the construction, arrangement and purposes ofthe parts as well as the materials used, without departing from thespirit and scope of the invention as will be hereinafter defined in theclaims.

I claim:

1. In a pump of the class described, a base, a bracket mounted on thebase, said bracket having opposed grooves, a, fulcrum having a sleeveportion, a tubular bearing for the sleeveporti-on having its ends seatedin the grooves and slidably adjustable in the same, a-bolt extendingthrough the tubularbearing and adapted to hold the same in adjustedposition in the grooves, a pump rod, a handle pivotally connected to thepump rod, and a pivotal connection between the fulcrum and the handle.

2. In a pump of the class described, a base, a plate on the upper end ofthe base and having a guide opening, a pump rod operating in saidopening, a cap comprising a two-part member having coacting baseportions jointly connected to the base with the plate, said cap portionshaving spaced sides and coacting horizontal upper portions, a bushingheld in the latter portions and slidably receiving the pump rod, connections between the sides of the cap, a handle pivotally connected tothe pump rod and extending between the sides of the cap, and a fulcrumsupported for adjustment toward and away from the pump rod in the sideportions of the cap and having adjustable connection with the handle; 7

3. In a pump, a base having a top flange formed with an upwardlyprojectingshoulder at the inside, a plate mounted on the shoulder, agasket interposed between the plate and shoulder, said plate having anelongated sleeve portion for receiving a pump rod, and means to connectthe plate and flange.

,4. In a pump, a base having a top flange formed with an upwardlyprojecting shoulder at the inside, a plate mounted on the shoulder, agasket interposed .between the plate and shoulder, said plate having anelongated sleeve portion for receiving a pump rod, said sleeve having anapertured end wall and forming a stuffing box, a packing in the box, anut threaded in theslecve over the packing, and a cap on the plate andbolted to the plate and flange.

5. Ina pump of the class described, a base having a top'shoulder, aplate mounted on,

the shoulder and havingan elongated sleeve portion at the center and anupstanding annular shoulder spaced therefrom, a bracket comprisingseparable sections vhaving base portions engaging the shoulder toposition the bracketon the plate, means for connecting the plate andbaseport-ions to the base,'a guide member supported in an outstandingposition at the upper end of the bracket, :1 pump rod adapted toreciprocate in the sleeve and member, connecting means be tween the sitles of the bracket and positioned at the top and bottom thereof, afulerum pivoted between the sides of the bracket and a lever pivoted onthe fulcrum and having pivotal connection with the pump rod. i

c. In a pump, a cap adapted to be arranged upon the top of a pump base,said cap con'iprising two sections having upwardly extending sides,connecting means between said sides, semi-circular portions formed withand projecting forwardly from the upper end of the sides and coacting toform a ring, said portions having coacting recesses forming slots, and apump rod receiving bushing having a top shoulder and peripheralprojections adapted to enter the slots and disposed beneath the collarto retain the bushing from displacement.

7. In a pump, a cap in the form of a bracket comprising spaced sideportions having semi-circular base portions abutting for engagement withthe top plate of a pump base and adapted to be secured to the latter,said bracket having inner and outer reinforcing webs and openings foraccess to the attaching means thereof.

8. In a pump, abase having a top plate, a top bracket fitting on the topplate and adapted to be secured to the latter, arms projectinghorizontally from the bracket and having internal. grooves andcommunicating apertures disposed in opposed relation, a spacing andbearing sleeve disposed between the arms and having its ends movable inthe grooves, a bolt to pass through said sleeve and selectively throughany pair of opposed openings in said arms a fulcrum pivoted on thesleeve, a pump rod, and a handle connected therewith and with thefulcrum.

9. In. a pump of the class described, a base having a top flange, aplate overlying the same having a guide opening for a pump rod, a cap inthe form ofa bracket having a base portion mounted on the plate, theplate and base portion being bolted together to the top flange of thebase, a pump rod slidable in the plate and bracket, a fulcrum mounted onsaid l'ni'acket, and a-pump handle connected therewith and with saidrod.

10. In a pump, a base having a top flange formed with an upwardlyprojecting shoulder at the inside, a plate mounted on the packing memberto fit between the bracket and base including a plate having a sleeveshoulder, a gasket interposed between the plate and shoulder, said platehaving an elongated sleeve portion for receiving a pump rod, said sleevehaving an apertured end wall and forminga sti'ifling box, a packing inthe box, and a nut threaded in the sleeve over the packing.

1].. In a pump, a cap adapted to be arranged upon the top of a pumpbase,'said cap com prising two sections having upwardly extending sides,connecting means between said sides, semi-circular portions formed withand projecting forwardly from the upper ends of the sides and coactingto form a ring, said portions having slots, and a pump rod receivingbushing supported in the collar and having projections to pass into theslots and retain the bushing against displacement.

12. In a pump, a .bracket having coacting recessed portions, a bearingbushing supported in. the recesses, said portions having vertical slotsin their inner faces and lugs on the bushing adapted to pass through theslots and engage the bottom of said portions to retain the bushing inposition.

In a device of the class described, a top ln-acket to fit on the base ofa pump, a packing member to fit between the bracket and base including aplate having a sleeve provided with an opening for receiving a pump rod,and an upstanding shoulder to provide means for locating said bracket inproper relation to said base.

14. In a device of the class described, a top bracket to fit on the baseof a pump, said bracket having a fastening pad portion, a

provided with an openingv forreceiving a pump rod, and an upstandingannular shoulder for locating the pad portion of said bracket in properrelation to said base.

15. The combination with a pump base having an outstanding flange at itsupper end and an upstanding shoulder spaced from the outer edge of theflange; of a plate, 'a-

and below the same, the bottom ofthe' stuffing box being apertured andhaving a surrounding annular seat, a packing in the box, a nut threadedin the upper extension of the stuffing box and engaging the packing, andan annular projection on the plate around the stuffing box adaptedtobeen-' gaged by a pump cap.

17 In a pump, the combination of a pump base having an outstandingflange at its upper end, a plate overlying the top of said base andhaving a central guide opening therein to receive a pump rod, a pump rodextending throu h said opening and above the pump base or operation, acap bracket having afastening pad portion overlying "15' guide for apart co-extensivewith said pump 1 rod, means for operatlng said pumprod,,

said plate, said bracket also providinga and through bolts passingthroughsaid outstanding flange, through said plate and through thefastening pad portion of said cap bracket for holding said partstogether in a rigid assembly.

18. In a pump as set forth in claim 17, theprovision of a gasket betweensaid plate and thetop of said pump base to be compressed in the,fastening together ,of said flange, plate, and cap bracket. 7 j SWANLARSON.

